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Everything posted by Xlucine
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And they're not making it? but I need 200k psi guns in my life
- 2,032 replies
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- russia strng tied edition
- unmanned madness
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Why heavier boolits are better: a thermodynamic view
Xlucine replied to Xlucine's topic in Ballistics Science Discussion
Yep, since you'll end up with less time for the boolit to move before the powder is all burnt- 26 replies
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- implying I understand thermo
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Why heavier boolits are better: a thermodynamic view
Xlucine replied to Xlucine's topic in Ballistics Science Discussion
In theory yes, although the effect is probably quite small - the forces to break that seal ought to be pretty minor in comparison. Might be interesting to see if someone could actually try it and see if there's an MV increase- 26 replies
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- implying I understand thermo
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Richard Anderson is the hero tanknet deserves. Also, he wrote a very good book. Buy it if you want to know just about everything possible about d-day
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We need to attract him to the wehraboo hunting cause on the WoT forum
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Thinking about the effect of a heavier boolit on the combustion, it reminded me of what my thermo lecturer was talking about with the idealised otto cyle and diesel cycle - modelling the combustion as simple heat addition, a heavier boolit will get more PdV work. So, the otto cycle is more efficient than a diesel cycle ceteris paribus - this is because the ignition of the fuel is so quick it's kinda like isochoric heat addition (i.e. constant volume), whereas diesels are limited by the time it takes to inject the fuel* so are better approximated by isobaric heat addition (constant pressure, so with volume increasing). Since some travel is taking place in the diesel cycle before all the heat is added, there's less area under the P-V diagram so less work is done. *according to my lecturer, non-direct injection diesels are not halal Something similar will happen with a heavier boolit - it will have moved less before all the propellant is combusted, so it's closer to the ideal of holding the bullet in place until all the propellant has combusted to maximise PdV work*. A light boolit, OTOH, will have moved down the tube more when the pressure in the chamber was low, so doesn't get as much work done on it. The rate of combustion is probably proportional to pressure and temp as well, giving an even more pronounced effect. All this is happening completely separate to the not-quasi-equilibrium thingy with the ratio of propellant gas speeds and boolit speed - that reduces efficiency towards the end of the barrel, whereas this reduces efficiency near the chamber where velocities are much lower *maximum pressure limits are for wusses
- 26 replies
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- implying I understand thermo
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So, the whole barrel recoils? And they're talking about how it's more accurate than a semi-auto?
- 10,752 replies
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- schv
- big bullit
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Vehicles of the PLA: Now with refreshing new topic title!
Xlucine replied to Khand-e's topic in Mechanized Warfare
Just a roided L7, or something more? -
Vehicles of the PLA: Now with refreshing new topic title!
Xlucine replied to Khand-e's topic in Mechanized Warfare
Notice the much smaller gap between the return rollers and road wheels when it's on the truck compared to when it's on the desert. Seems to have some kind of controllable suspension -
WD-40 is yankee garbage, ZX-54 is the one true lubricant! A liberal dousing of that stuff would be a very good thing for that tank. I don't know much about that vehicle - AFAIK it's sat in that spot for the past few decades, and now it's been moved out of the way of the creepy looking horse replicas the museum can keep on ignoring it.
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If the apaches did have longbows, how much would they have genocided the other tribes?
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Hopefully we don't have to start basing a useful number of typhoons down there permanently, that'd drain money away from useful things like new tanks. Also Lol daily express
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The Soviet Tank Thread: Transversely Mounted 1000hp Engines
Xlucine replied to T___A's topic in Mechanized Warfare
It would be very easy to fit a proper basket to IS-7, since it has the needed rotating floor already. Just add some mesh. Same happens with abramses, per tanknet at least one abrams turret has been jammed by a .50 case in the wrong place- 5,220 replies
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- soviet
- russian bias
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(and 15 more)
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- soviet
- russian bias
- kharkovites get out
- kotin number 1 diva of ages
- kartsev did nothing wrong
- reminder that the is-7 had 8 machine guns
- reminder that uvz built more t-34s than khpz
- real life has a uvz bias
- make lkz great again
- t-72 over t-64 all day erry day
- t-80 worst mistake of lkz life
- the object 167t engine was better
- so was object 278 engine
- t-64 so weak it cannot handle glorious t-34 engine which conquered hitlerite germany
- t-64
- t-72
- heavy tanks
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Collimatrix's Terrible Music Thread
Xlucine replied to Collimatrix's topic in Fiction & Entertainment
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- music
- stuff white people like
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Randall Munroe is an Ignorant Philistine Who Lacks Taste
Xlucine replied to LostCosmonaut's topic in Fiction & Entertainment
Ripe pears are awesome, chewing is for plebs -
A round that is unstable when subsonic must hold great appeal to the designer of military ranges (after all, the cone-stabilised training rounds for tank guns have a similar property), but I cannot see it having as much appeal to those who must use it - especially with all the "individual weapons must be capable of delivering 5 million joules of energy at all visible ranges" rhetoric from the gerpercer crowd. Squinting at the rims in that photo, it doesn't look like it'll be a straight barrel swap
- 10,752 replies
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- schv
- big bullit
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The Soviet Tank Thread: Transversely Mounted 1000hp Engines
Xlucine replied to T___A's topic in Mechanized Warfare
Even if the AL requires the loaders to move the ready rack conveyor then it's still just like the AL on AMX-13 AIUI. Why the hell didn't it have more ammo? 2.5k is abysmal, chieftain and M60 have twice that (or thereabouts) in the ready boxes for their coaxes. The boolit stool for the gunner was neat, but it sorely needs more MG ammo- 5,220 replies
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- soviet
- russian bias
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(and 15 more)
Tagged with:
- soviet
- russian bias
- kharkovites get out
- kotin number 1 diva of ages
- kartsev did nothing wrong
- reminder that the is-7 had 8 machine guns
- reminder that uvz built more t-34s than khpz
- real life has a uvz bias
- make lkz great again
- t-72 over t-64 all day erry day
- t-80 worst mistake of lkz life
- the object 167t engine was better
- so was object 278 engine
- t-64 so weak it cannot handle glorious t-34 engine which conquered hitlerite germany
- t-64
- t-72
- heavy tanks
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Setting The Record Straight On The Sherman
Xlucine replied to Sturgeon's topic in Mechanized Warfare
See walter's sig -
Because you're playing an ARL V39?
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The Soviet Tank Thread: Transversely Mounted 1000hp Engines
Xlucine replied to T___A's topic in Mechanized Warfare
shrek.jpg AFAIK it's just sand to erode things- 5,220 replies
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- soviet
- russian bias
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(and 15 more)
Tagged with:
- soviet
- russian bias
- kharkovites get out
- kotin number 1 diva of ages
- kartsev did nothing wrong
- reminder that the is-7 had 8 machine guns
- reminder that uvz built more t-34s than khpz
- real life has a uvz bias
- make lkz great again
- t-72 over t-64 all day erry day
- t-80 worst mistake of lkz life
- the object 167t engine was better
- so was object 278 engine
- t-64 so weak it cannot handle glorious t-34 engine which conquered hitlerite germany
- t-64
- t-72
- heavy tanks
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So, now we've established dinosaurs had feathers, how about thermoregulation? *ducks for cover*
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